1680507 has 10 divisors (see below), whose sum is σ = 2510508. Its totient is φ = 1120284.

The previous prime is 1680491. The next prime is 1680509. The reversal of 1680507 is 7050861.

It is not a de Polignac number, because 1680507 - 2⁴ = 1680491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1680509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10293 + ... + 10454.

2^1680507 is an apocalyptic number.

1680507 is a deficient number, since it is larger than the sum of its proper divisors (830001).

1680507 is an equidigital number, since it uses as much as digits as its factorization.

1680507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759 (or 20750 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1680507 is about 1296.3437044241. The cubic root of 1680507 is about 118.8903964574.

It can be divided in two parts, 1680 and 507, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1680507 in words is "one million, six hundred eighty thousand, five hundred seven".